The layout of corrugated beam barriers ;is that the beams are corrugated in the longitudinal direction so that it provides higher lateral stiffness with a thinner material. Moreover, the distance between beams posts and crashing vehicles are considerably increased. In case the beam barriers are tensioned, it is intended to create a stiff beam erected on relatively weak posts. During vehicle collision, the posts would be separated from the beams and there would be lesser deceleration experienced by the vehicles. http://www.jxtransportation.com/highway-barrier/corrugated-beam-barrier/